RAINBOW is the first studio album released by Hiromi. The song "Aisaretai" was released as a re-cut single three months later. The album was released on iTunes with a different title, cover art, and tracklist. Hiromi's Edition doesn't include the song "RECOVER", and includes the tracks "Complete" and "Hate U", originally released on her debut mini-album True Colors. The album reached #62 on the Oricon weekly charts and charted for 5 weeks, selling 2,969 copies on it's first week.